Improvement in plows



T. S. '& J. A. LOCKHART.

Plow.

Patented Nov. 27. 1860.

FHOTO LITHOGRAPHEE WASHINGTON D C UNITED STATES PATENT OFFICE.

THOMAS S. LOOKHART AND JOHN A. LOOKHART, OF WELLINGTON, MISSOURI.

IMPROVEMENT IN PLOWS.

Specification forming part of Letters Patent No. 30,740, dated November27, 1860.

To all whom it may concern Be it known that we, THOMAS S. LOCKHART andJOHN A. IJOGKHART, of Wellington, in the county of La Fayette and Stateof Missouri, have invented a new and useful Improvement in Flows; and Wedo hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming a part of this specification, in which-- Figure 1represents a perspective side view of the plow; Fig. 2, a perspectiveview of the other side of the lower part of the plow, and Fig. 3 ahorizontal cross section.

Similar letters of reference in each of the several figures indicatecorresponding parts.

The nature of our invention consists in the arrangement of a bent rodserving as a standard, a collar fastened to the inside of the moldboard,and a curved brace, in combination with perforations in the standard andnuts, for the purpose to be d scribed.

To enable others skilled in the art to make and use our invention, we.will proceed to describe its construction and operation.

The standard of this plow consists of a rod formed into a verticalportion, O, provided with two or more holes, H H, a horizontal part, O,and another vertical part curved in a line adapted to the shape of themold-board J. This standard is permanently secured to the beam A andhandles B B. The mold-board J slides upon the curved part 0 of thestandard by means of a collar, I, fastened to the inside of themold-board and embracing the rod 0', as seen in the drawings.

A brace, E, curved in the line of an arc of a circle the center of whichis in the collar I, is secured at one end to the mold-board, as seen atF, while its other and screw-threaded end passes through one of theholes H in the standard, and is fastened to the latter by nuts G G.

It will be seen that on unscrewing the outer nut G the mold-board can beswung on the part 0 of the standard a sufficient distance to withdrawthe end of the curved brace E from its hole H. The mold-board can thenbe moved up or down on standard 0 and secured in its position byinserting the end of the curved brace E into the corresponding hole, H,and again screwing the nut G to the outer end of said curved bra -e.Thus it will be understood the pitch of the mold-board can be adjusted.

By adjusting the clamping-nuts G G the brace E can be lengthened orshortened, so as to set the mold-board 1110lc or less obliquely, andthus cause it to cut a larger or smaller slice of land.

The double adjustability of this plow is obtained by very simple means,as will be seen from the above description, and the whole constrnctioncombines strength and lightness.

What we claim as our invention, and desire to secure by Letters Patent,is-- .The arrangement of a bent rod, 0 O 0, serving as a standard, acollar, I, fastened to the inside of the mold-board J, and a curvedbrace, E, in combination with perforations H H in the standard and nutsG G, substantially as and for the purposes set forth.

. The abovespecification of our improvement in plows signed by us this13th day of September, 1860.

THOMAS S. LOGKHART. JOHN A. LOGKHART. Witnesses J. L. MARsHALL, JOSEPHTIDBALL.

